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Taking the fun with you is a great advantage of inflatable boats and small fishing boats. Mercury offers a complete line of portable FourStroke outboards that are extremely light, with the widest range of models to choose from. The entire line makes operation and portability easy with smart, simple features. Plus, clean, quiet, fuel-efficient FourStroke performance makes them the obvious power of choice.

2.5 AND 3.5 HP
Patented one-piece integrated cylinderblock design provides added reliability by eliminating gaskets and fasteners and makes the powerhead much more compact and lightweight.
Check oil level without removing the cowling with convenient, easy-to-view sight gauge.
This engine delivers maximum performance with the largest displacement in the 2.5 hp category.
A twist-grip throttle and 360-degree steering make it easy to use.



Parts Manual

Service Manual

Owners Manual

What year is my engine?

Manufacturer: MERCURY Cooling: Water-cooled w/thermostat
Make: F2.5M 4S Ignition: CDI w/electric spark advance
Year: Starting: Manual
Engine Type: 2.5 HP 4-STROKE Exhaust: Above prop
Horsepower: 2 Trim: 4 positions
Displacement: 5.2/85(in/cc) Fuel Induction: 2-valve single overhead cam
Bore/Stroke: 2.16x1.42/55x36(in/mm) Lubrication: Splash
Cylinders: 1 Steering Tiller with 360 turning
RPM: 5000-6000    
Weight: 38/17(lbs/kg) PRICING These prices are the "Manufacturer Suggested Retail Prices" (MSRP). These are just for comparison.
Gear Ratio: 2.15:1 US: 965 dollars
Shaft lenght: 15/381(in/mm) UK: 499 pounds
Gears: F N Netherlands: 884 euros
    France: euros
    Australia: dollars

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